FSB/PSB/001/00

Protection to fire-fighting system i.e sprinkler, rising mains, hydrant etc. An Individual Standard for the wet & dry riser is required in Singapore Fire Safety Bureau. The fire resistance test procedure is described in FSB/PSB/001/00 dated 8 November 2000. This test procedure was adopted specially for the needs in Singapore for testing the fire resistance performance of steel pipe for rising main. In a building, piping for rising main may run through the compartment. It is a concern for Fire Safety and Shelter Department that such piping for rising main need to be adequately protected. Otherwise, in the event of a fire, the piping may not only collapse, reducing the water pressure at the fire-fighting point but will also heat up the water conveying through it for fire-fighting by firemen. The water may reach a stage of boiling and scald the firefighters in the action of releasing the water for fire-fighting. This test procedure was written to facilitate the testing of fire resistance performance of steel piping for rising main. It excludes piping containing fuel and gases. The water boiling point temperature of 100°C is used as a reference. The cladding of the steel pipe is expected to be able to insulate the piping. It is felt that the external surfaces of the steel pipe, on the fire side, shall maintain a temperature not exceeding 75°C above the initial temperature and that on the unexposed side, measured on the cladding, not exceeding 180°C above initial temperature. The test is conducted with air as a medium in the pipe. With water, heat losses from the pipe are expected to be higher, thereby making the test less onerous. The fire resistance performance of the system is based on the integrity and insulation criterions for the unexposed face and the insulation criterion for the exposed face to the fire.